[PATCH 5.10] drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring

[Roman Demidov]

From: Yinjie Yao <yinjie.yao@xxxxxxx>

commit 79405e774ede411c6b47ed41c651e40b92de64a2 upstream.

JPEG rings do not support 64-bit user fence writes, reject CS
submissions with user fences.

Fixes: 14f43e8f88c5 ("drm/amdgpu: move JPEG2.5 out from VCN2.5")
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Yinjie Yao <yinjie.yao@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
(cherry picked from commit 3216a7f4e2642bda5fd14f57586e835ae9202587)
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
[ Roman: Version 5.10 does not yet support JPEG2.6, so the fix is being
applied only to JPEG2.5 ]
Signed-off-by: Roman Demidov <roman.demidov.nn@xxxxxxxxx>
---
Backport fix for CVE-2026-63847

 drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
index 8c84e35c2719..dfb96f052f6d 100644
--- a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
@@ -566,6 +566,7 @@ static const struct amd_ip_funcs jpeg_v2_5_ip_funcs = {
 static const struct amdgpu_ring_funcs jpeg_v2_5_dec_ring_vm_funcs = {
 	.type = AMDGPU_RING_TYPE_VCN_JPEG,
 	.align_mask = 0xf,
+	.no_user_fence = true,
 	.vmhub = AMDGPU_MMHUB_1,
 	.get_rptr = jpeg_v2_5_dec_ring_get_rptr,
 	.get_wptr = jpeg_v2_5_dec_ring_get_wptr,
-- 
2.53.0